I downloaded gimp 2.8 and the xquartz 2.7.1, I currently have mac os x 10.6.8. when i downloaded gimp it told me to download xquartz which i did, but whenever I try to open gimp, it just doesn't open. The application appears on my dock and I click it but nothing happens! I've restarted my laptop a bunch of times and I tried to re-install the program but it didn't work! any help? thanks alot !!